package com.schedule.config;

import com.schedule.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMVCConfig extends WebMvcConfigurationSupport {
    /**
     * 若静态资源不放在resources下的static文件夹下，则该资源无法被访问，设置配置类解决此问题。
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info(" 开始进行静态资源映射 ");
        registry.addResourceHandler("/static/**")
                .addResourceLocations("classpath:/static/");
    }

    /**
     * 扩展mvc的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器
        MappingJackson2HttpMessageConverter messageConverter=new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用jackson将java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());

        //将对象转换器追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);

    }
}
